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/* ==== machdep.h ============================================================
* Copyright (c) 1994 Chris Provenzano, proven@athena.mit.edu
*
* $Id$
*
*/
#include <unistd.h>
#include <setjmp.h>
#include <sys/time.h>
#include <sys/cdefs.h>
/*
* The first machine dependent functions are the SEMAPHORES
* needing the test and set instruction.
*/
#define SEMAPHORE_CLEAR 0
#define SEMAPHORE_SET 0xff
#define SEMAPHORE_TEST_AND_SET(lock) \
({ \
char *p = lock; \
long temp; \
\
__asm__ volatile("ldstub %1,%0" \
:"=r" (temp) \
:"m" (*p) \
:"memory"); \
temp; \
})
#define SEMAPHORE_RESET(lock) \
{ \
__asm__ volatile("stb %1, %0" \
:"=m" (*lock) \
:"r" (SEMAPHORE_CLEAR) \
:"memory"); \
}
/*
* More machine dependent macros
*/
#ifdef PTHREAD_KERNEL
#define machdep_save_float_state(x)
#define machdep_restore_float_state()
#endif
/*
* New types
*/
typedef char semaphore;
/*
* sigset_t macros
*/
#define SIGMAX 31
#define SIG_ANY(sig) \
({ \
sigset_t *sig_addr = (sigset_t *)&sig; \
int ret = 0; \
int i; \
\
for (i = 1; i <= SIGMAX; i++) { \
if (sigismember(sig_addr, i)) { \
ret = 1; \
break; \
} \
} \
ret; \
})
/*
* New Strutures
*/
struct machdep_pthread {
void *(*start_routine)(void *);
void *start_argument;
void *machdep_stack;
struct itimerval machdep_timer;
jmp_buf machdep_state;
};
/*
* Static machdep_pthread initialization values.
* For initial thread only.
*/
#define MACHDEP_PTHREAD_INIT \
{ NULL, NULL, NULL, { { 0, 0 }, { 0, 100000 } }, 0 }
/*
* Minimum stack size
*/
#undef PTHREAD_STACK_MIN /* Defined in limits.h */
#define PTHREAD_STACK_MIN 1024
/*
* Some fd flag defines that are necessary to distinguish between posix
* behavior and bsd4.3 behavior.
*/
#define __FD_NONBLOCK (O_NONBLOCK | O_NDELAY)
/*
* New functions
*/
__BEGIN_DECLS
#if defined(PTHREAD_KERNEL)
#define __machdep_stack_get(x) (x)->machdep_stack
#define __machdep_stack_set(x, y) (x)->machdep_stack = y
#define __machdep_stack_repl(x, y) \
{ \
if (stack = __machdep_stack_get(x)) { \
__machdep_stack_free(stack); \
} \
__machdep_stack_set(x, y); \
}
void * __machdep_stack_alloc __P_((size_t));
void __machdep_stack_free __P_((void *));
int machdep_save_state __P_((void));
#endif
__END_DECLS
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